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Xu J, Tian L, Qi W, Lv Q, Wang T. Advancements in NSCLC: From Pathophysiological Insights to Targeted Treatments. Am J Clin Oncol 2024; 47:291-303. [PMID: 38375734 PMCID: PMC11107893 DOI: 10.1097/coc.0000000000001088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/21/2024]
Abstract
With the global incidence of non-small cell lung cancer (NSCLC) on the rise, the development of innovative treatment strategies is increasingly vital. This review underscores the pivotal role of precision medicine in transforming NSCLC management, particularly through the integration of genomic and epigenomic insights to enhance treatment outcomes for patients. We focus on the identification of key gene mutations and examine the evolution and impact of targeted therapies. These therapies have shown encouraging results in improving survival rates and quality of life. Despite numerous gene mutations being identified in association with NSCLC, targeted treatments are available for only a select few. This paper offers an exhaustive analysis of the pathogenesis of NSCLC and reviews the latest advancements in targeted therapeutic approaches. It emphasizes the ongoing necessity for research and development in this domain. In addition, we discuss the current challenges faced in the clinical application of these therapies and the potential directions for future research, including the identification of novel targets and the development of new treatment modalities.
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Affiliation(s)
- Jianan Xu
- College of Traditional Chinese Medicine, Changchun University of Chinese Medicine
| | - Lin Tian
- Pulmonology Department, The Affiliated Hospital to Changchun University of Chinese Medicine, Changchun, P.R. China
| | - Wenlong Qi
- Pulmonology Department, The Affiliated Hospital to Changchun University of Chinese Medicine, Changchun, P.R. China
| | - Qingguo Lv
- Pulmonology Department, The Affiliated Hospital to Changchun University of Chinese Medicine, Changchun, P.R. China
| | - Tan Wang
- Pulmonology Department, The Affiliated Hospital to Changchun University of Chinese Medicine, Changchun, P.R. China
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Araghi M, Mannani R, Heidarnejad maleki A, Hamidi A, Rostami S, Safa SH, Faramarzi F, Khorasani S, Alimohammadi M, Tahmasebi S, Akhavan-Sigari R. Recent advances in non-small cell lung cancer targeted therapy; an update review. Cancer Cell Int 2023; 23:162. [PMID: 37568193 PMCID: PMC10416536 DOI: 10.1186/s12935-023-02990-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Accepted: 07/12/2023] [Indexed: 08/13/2023] Open
Abstract
Lung cancer continues to be the leading cause of cancer-related death worldwide. In the last decade, significant advancements in the diagnosis and treatment of lung cancer, particularly NSCLC, have been achieved with the help of molecular translational research. Among the hopeful breakthroughs in therapeutic approaches, advances in targeted therapy have brought the most successful outcomes in NSCLC treatment. In targeted therapy, antagonists target the specific genes, proteins, or the microenvironment of tumors supporting cancer growth and survival. Indeed, cancer can be managed by blocking the target genes related to tumor cell progression without causing noticeable damage to normal cells. Currently, efforts have been focused on improving the targeted therapy aspects regarding the encouraging outcomes in cancer treatment and the quality of life of patients. Treatment with targeted therapy for NSCLC is changing rapidly due to the pace of scientific research. Accordingly, this updated study aimed to discuss the tumor target antigens comprehensively and targeted therapy-related agents in NSCLC. The current study also summarized the available clinical trial studies for NSCLC patients.
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Affiliation(s)
- Mahmood Araghi
- Department of Pathology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Reza Mannani
- Vascular Surgeon, Department of Surgery, Faculty of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | | | - Adel Hamidi
- Razi Vaccine and Serum Research Institute, Arak Branch, karaj, Iran
| | - Samaneh Rostami
- School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | | | - Fatemeh Faramarzi
- Department of Immunology, School of Medicine, Mazandaran University of Medical Sciences, Sari, Iran
| | - Sahar Khorasani
- Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Mina Alimohammadi
- Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Safa Tahmasebi
- Student Research Committee, Department of Immunology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Reza Akhavan-Sigari
- Department of Neurosurgery, University Medical Center, Tuebingen, Germany
- Department of Health Care Management and Clinical Research, Collegium Humanum Warsaw Management University Warsaw, Warsaw, Poland
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Repurposing Drugs in Small Animal Oncology. Animals (Basel) 2022; 13:ani13010139. [PMID: 36611747 PMCID: PMC9817697 DOI: 10.3390/ani13010139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Revised: 12/18/2022] [Accepted: 12/22/2022] [Indexed: 12/31/2022] Open
Abstract
Repurposing drugs in oncology consists of using off-label drugs that are licensed for various non-oncological medical conditions to treat cancer. Repurposing drugs has the advantage of using drugs that are already commercialized, with known mechanisms of action, proven safety profiles, and known toxicology, pharmacokinetics and pharmacodynamics, and posology. These drugs are usually cheaper than new anti-cancer drugs and thus more affordable, even in low-income countries. The interest in repurposed anti-cancer drugs has led to numerous in vivo and in vitro studies, with some promising results. Some randomized clinical trials have also been performed in humans, with certain drugs showing some degree of clinical efficacy, but the true clinical benefit for most of these drugs remains unknown. Repurposing drugs in veterinary oncology is a very new concept and only a few studies have been published so far. In this review, we summarize both the benefits and challenges of using repurposed anti-cancer drugs; we report and discuss the most relevant studies that have been previously published in small animal oncology, and we suggest potential drugs that could be clinically investigated for anti-cancer treatment in dogs and cats.
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Wang DD, Li YF, Zhang C, He SM, Chen X. Predicting the effect of sirolimus on disease activity in patients with systemic lupus erythematosus using machine learning. J Clin Pharm Ther 2022; 47:1845-1850. [PMID: 36131617 DOI: 10.1111/jcpt.13778] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Revised: 08/03/2022] [Accepted: 09/04/2022] [Indexed: 11/30/2022]
Abstract
WHAT IS KNOWN AND OBJECTIVES The present study aimed to predict the effect of sirolimus on disease activity in patients with systemic lupus erythematosus (SLE) using machine learning and to recommend appropriate sirolimus dosage regimen for patients with SLE. METHODS The Emax model was selected for machine learning, where the evaluation indicator was the change rate of systemic lupus erythematosus disease activity index from baseline value. RESULTS A total 103 patients with SLE were included for modelling, where the Emax , ET50 were -53.9%, 1.53 months in the final model respectively, and the evaluation of the final model was good. Further simulation found that the follow-up time to achieve 25%, 50%, 75% and 80% (plateau) Emax of sirolimus effecting on disease activity in patients with SLE were 0.51, 1.53, 4.59 and 6.12 months, respectively. In addition, the sirolimus dosage was flexible and adjusted according to drug concentration, where the intersection of sirolimus concentration range included in this study was about 8-10 ng/ml. WHAT IS NEW AND CONCLUSIONS This study was the first time to predict the effect of sirolimus on disease activity in patients with SLE and in order to achieve better therapeutic effect maintaining a concentration of 8-10 ng/ml sirolimus for at least 6.12 months was necessary.
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Affiliation(s)
- Dong-Dong Wang
- Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, School of Pharmacy, Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Ya-Feng Li
- Department of Pharmacy, Feng Xian People's Hospital, Xuzhou, Jiangsu, China
| | - Cun Zhang
- Department of Pharmacy, Xuzhou Oriental Hospital Affiliated to Xuzhou Medical University, Xuzhou, Jiangsu, China
| | - Su-Mei He
- Department of Pharmacy, Suzhou Science & Technology Town Hospital, Gusu School, Nanjing Medical University, Suzhou, Jiangsu, China
| | - Xiao Chen
- School of Nursing, Xuzhou Medical University, Xuzhou, Jiangsu, China
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Peng Y, Wang Y, Zhou C, Mei W, Zeng C. PI3K/Akt/mTOR Pathway and Its Role in Cancer Therapeutics: Are We Making Headway? Front Oncol 2022; 12:819128. [PMID: 35402264 PMCID: PMC8987494 DOI: 10.3389/fonc.2022.819128] [Citation(s) in RCA: 140] [Impact Index Per Article: 70.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Accepted: 03/04/2022] [Indexed: 12/12/2022] Open
Abstract
Cancer is a severe public health issue that is a leading cause of mortality globally. It is also an impediment to improving life expectancy worldwide. Furthermore, the global burden of cancer incidence and death is continuously growing. Current therapeutic options are insufficient for patients, and tumor complexity and heterogeneity necessitate customized medicine or targeted therapy. It is critical to identify potential cancer therapeutic targets. Aberrant activation of the PI3K/AKT/mTOR pathway has a significant role in carcinogenesis. This review summarized oncogenic PI3K/Akt/mTOR pathway alterations in cancer and various cancer hallmarks associated with the PI3K/AKT/mTOR pathway, such as cell proliferation, autophagy, apoptosis, angiogenesis, epithelial-to-mesenchymal transition (EMT), and chemoresistance. Importantly, this review provided recent advances in PI3K/AKT/mTOR inhibitor research. Overall, an in-depth understanding of the association between the PI3K/AKT/mTOR pathway and tumorigenesis and the development of therapies targeting the PI3K/AKT/mTOR pathway will help make clinical decisions.
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Affiliation(s)
- Yan Peng
- Department of Obstetrics, Longhua District Central Hospital, Shenzhen, China
| | - Yuanyuan Wang
- Xianning Medical College, Hubei University of Science and Technology, Xianning, China
| | - Cheng Zhou
- Department of Medical Laboratory, Shenzhen Longhua District Central Hospital, Guangdong Medical University, Shenzhen, China
| | - Wuxuan Mei
- Xianning Medical College, Hubei University of Science and Technology, Xianning, China
| | - Changchun Zeng
- Department of Medical Laboratory, Shenzhen Longhua District Central Hospital, Guangdong Medical University, Shenzhen, China
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Xu G, Fang J, Xu J, Shen Z, Huang C, Jiang Y. Expression and significance of mammalian target of rapamycin in cutaneous squamous cell carcinoma and precancerous lesions. Bioengineered 2021; 12:9930-9938. [PMID: 34874800 PMCID: PMC8810078 DOI: 10.1080/21655979.2021.1984719] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
The aim of this study is to explore the role of mammalian target of rapamycin (mTOR) in cutaneous squamous cell carcinoma (CSCC), Bowen’s disease (BD), and actinic keratosis (AK) with squamous cell differentiation abnormality and its relationship with the degree of tumor proliferation. Thirty cases of clinical paraffin specimens of CSCC, BD, and AK were each collected from Jinhua Fifth Hospital, while 30 cases of normal skin specimens surgically resected in Department of Plastic Surgery were selected as controls. The expressions of mTOR and Ki-67 in tissues were detected by immunohistochemical staining. The positive expression rate of mTOR in the CSCC group was higher than those in the BD group and AK group (P < 0.05), while it was higher in the BD group and AK group than in the normal skin group (P < 0.05). The CSCC group had a higher positive expression rate of Ki-67 than the AK group (P < 0.01). The results of logistic regression analysis showed that the pathogenic site [odds ratio (OR) = 1.189, 95% confidence interval (95%CI): 1.028–1.381, P = 0.021], course of disease (OR = 2.059, 95%CI: 1.036–4.087, P = 0.043), and differentiation degree (OR = 1.325, 95%CI: 1.169–1.512, P = 0.001) were independent factors for the positive expression of mTOR. OR>1, indicating that the factor is a risk factor. The expression levels of mTOR in CSCC, BD, and AK were positively correlated with the expression level of Ki-67 (r = 0.827, P < 0.01, r = 0.608, P < 0.01, r = 0.368, P = 0.045). These results suggest that mTOR may be involved in the pathogenesis of CSCC, and related to the proliferation degree of CSCC, as an index reflecting the proliferation status of CSCC.
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Affiliation(s)
- Gongjun Xu
- Department of Dermatology,Jinhua Fifth Hospital, JinHua, ZheJiang,China
| | - Jinxian Fang
- Department of Dermatology,Jinhua Fifth Hospital, JinHua, ZheJiang,China
| | - Jinlun Xu
- Department of Dermatology,Jinhua Fifth Hospital, JinHua, ZheJiang,China
| | - Zhen Shen
- Department of Dermatology,Jinhua Fifth Hospital, JinHua, ZheJiang,China
| | - Chiqing Huang
- Department of Dermatology,Jinhua Fifth Hospital, JinHua, ZheJiang,China
| | - Yixiu Jiang
- Department of Dermatology,Jinhua Fifth Hospital, JinHua, ZheJiang,China
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Chen X, Wang D, Wang G, Huang Y, Yu X, Lu J, Zhai X, Xu H, Li Z. Optimization of Initial Dose Regimen for Sirolimus in Pediatric Patients With Lymphangioma. Front Pharmacol 2021; 12:668952. [PMID: 34819851 PMCID: PMC8606893 DOI: 10.3389/fphar.2021.668952] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Accepted: 10/26/2021] [Indexed: 12/14/2022] Open
Abstract
Sirolimus is an effective oral treatment for pediatric patients with lymphangioma. The present clinical study in 15 children (0.12–16.39 years of age) examines the effects of underlying factors on sirolimus concentrations through application of a population pharmacokinetic model. Using Monte Carlo simulation, an initial dose regimen for sirolimus in pediatric patients with lymphangioma is presented. It is found that the lower the body weight, the higher the clearance rate and sirolimus clearances are 0.31–0.17 L/h/kg in pediatric patients with lymphangioma whose weights are 5–60 kg, respectively. The doses of sirolimus, 0.07, 0.06, 0.05 mg/kg/day are recommended for weights of 5–10, 10–24.5 and 24.5–60 kg in children with lymphangioma. This study is the first to establish a population pharmacokinetic model for sirolimus and to recommend initial doses in pediatric patients with lymphangioma. Large scale, prospective studies are needed in the future.
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Affiliation(s)
- Xiao Chen
- Department of Pharmacy, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China
| | - Dongdong Wang
- Department of Pharmacy, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China
| | - Guangfei Wang
- Department of Pharmacy, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China
| | - Yidie Huang
- Department of Pharmacy, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China
| | - Xin Yu
- Department of Pharmacy, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China
| | - Jinmiao Lu
- Department of Pharmacy, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China
| | - Xiaowen Zhai
- Department of Hematology and Oncology, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China
| | - Hong Xu
- Department of Nephrology, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China
| | - Zhiping Li
- Department of Pharmacy, National Children's Medical Center, Children's Hospital of Fudan University, Shanghai, China
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High in vitro and in vivo synergistic activity between mTORC1 and PLK1 inhibition in adenocarcinoma NSCLC. Oncotarget 2021; 12:859-872. [PMID: 33889306 PMCID: PMC8057272 DOI: 10.18632/oncotarget.27930] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2021] [Accepted: 03/15/2021] [Indexed: 01/22/2023] Open
Abstract
Significant rational is available for specific targeting of PI3K/AKT/mTOR pathway in the treatment of non-small cell lung cancer (NSCLC). However, almost all clinical trials that have evaluated Pi3K pathway-based monotherapies/combinations did not observe an improvement of patient’s outcome. The aim of our study was therefore to define combination of treatment based on the determination of predictive markers of resistance to the mTORC1 inhibitor RAD001/Everolimus. An in vivo study showed high efficacy of RAD001 in NSCLC Patient-Derived Xenografts (PDXs). When looking at biomarkers of resistance by RT-PCR study, three genes were found to be highly expressed in resistant tumors, i.e., PLK1, CXCR4, and AXL. We have then focused our study on the combination of RAD001 + Volasertib, a PLK1 inhibitor, and observed a high antitumor activity of the combination in comparison to each monotherapy; similarly, a clear synergistic effect between the two compounds was found in an in vitro study. Pharmacodynamics study demonstrated that this synergy was due to (1) tumor vascularization decrease, increase of the HIF1 protein expression and decrease of the intracellular pH, and (2) decrease of the Carbonic Anhydrase 9 (CAIX) protein that could not correct intracellular acidosis. In conclusion, all these preclinical data strongly suggest that the inhibition of mTORC1 and PLK1 proteins may be a promising therapeutic approach for NSCLC patients.
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Development and Validation of a Bioanalytical LC-MS/MS Method for Simultaneous Determination of Sirolimus in Porcine Whole Blood and Lung Tissue and Pharmacokinetic Application with Coronary Stents. Molecules 2021; 26:molecules26020425. [PMID: 33467464 PMCID: PMC7829871 DOI: 10.3390/molecules26020425] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 01/04/2021] [Accepted: 01/13/2021] [Indexed: 02/06/2023] Open
Abstract
Sirolimus is a hydrophobic macrolide compound that has been used for long-term immunosuppressive therapy, prevention of restenosis, and treatment of lymphangioleiomyomatosis. In this study, a simple and sensitive liquid chromatography-tandem mass spectrometry (LC-MS/MS) was developed and validated for the simultaneous determination of sirolimus in both porcine whole blood and lung tissue. Blood and lung tissue homogenates were deproteinized with acetonitrile and injected into the LC-MS/MS system for analysis using the positive electrospray ionization mode. The drug was separated on a C18 reversed phase column with a gradient mobile phase (ammonium formate buffer (5 mM) with 0.1% formic acid and acetonitrile) at 0.2 mL/min. The selected reaction monitoring transitions of m/z 931.5 → 864.4 and m/z 809.5 → 756.5 were applied for sirolimus and ascomycin (the internal standard, IS), respectively. The method was selective and linear over a concentration range of 0.5–50 ng/mL. The method was validated for sensitivity, accuracy, precision, extraction recovery, matrix effect, and stability in porcine whole blood and lung tissue homogenates, and all values were within acceptable ranges. The method was applied to a pharmacokinetic study to quantitate sirolimus levels in porcine blood and its distribution in lung tissue following the application of stents in the porcine coronary arteries. It enabled the quantification of sirolimus concentration until 2 and 14 days in blood and in lung tissue, respectively. This method would be appropriate for both routine porcine pharmacokinetic and bio-distribution studies of sirolimus formulations.
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Li T, Huang JB, Lu JG, Li R, Wang Y, Shi XR, Shi MX, Zhang XD. Plasma thymidylate synthase and dihydrofolate reductase mRNA levels as potential predictive biomarkers of pemetrexed sensitivity in patients with advanced non-small cell lung cancer. J Thorac Dis 2020; 12:7313-7319. [PMID: 33447420 PMCID: PMC7797849 DOI: 10.21037/jtd-20-3185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Background High levels of thymidylate synthase (TS) and dihydrofolate reductase (DHFR) expression in tumour tissues are an indicator of ineffective responses to pemetrexed-based chemotherapy in various tumours, including non-small cell lung cancer (NSCLC). However, tumour tissues are highly heterogeneous, so a single biopsy may not reflect genetic alterations during disease progression. This study investigated the potential use of plasma TS and DHFR mRNA levels as biomarkers for predicting sensitivity to pemetrexed-based chemotherapy. Methods Plasma samples were obtained from 245 patients with advanced NSCLC and 30 healthy donors. Total RNA was extracted from the plasma samples, and TS and DHFR mRNA levels were determined via real-time PCR. TS and DHFR mRNA levels between cancer patients and healthy controls were compared. The association between plasma TS and DHFR mRNA levels and tumour response to pemetrexed/cisplatin chemotherapy was analysed. Results The plasma TS and DHFR mRNA levels decreased in patients with advanced NSCLC compared with healthy controls. Moreover, plasma TS and DHFR mRNA levels negatively correlated with tumour response to pemetrexed/cisplatin chemotherapy in patients with advanced NSCLC. Overall survival time was prolonged in patients with low TS mRNA expression compared with those with high TS mRNA expression, although the difference was not statistically significant. Conclusions Low expression levels of plasma TS and DHFR mRNA confer increased tumour sensitivity to pemetrexed/cisplatin chemotherapy in patients with advanced NSCLC. The results suggested that plasma TS and DHFR mRNA levels are promising biomarkers for choosing patients who are likely to respond and benefit the most from pemetrexed-based chemotherapy.
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Affiliation(s)
- Tao Li
- Department of Medical Oncology, Nantong Tumor Hospital, Nantong, China
| | - Jin-Bo Huang
- Department of Respiratory Medicine, Affiliated Hospital of Nantong University, Nantong, China
| | - Jun-Guo Lu
- Department of Medical Oncology, Nantong Tumor Hospital, Nantong, China
| | - Rong Li
- Department of Medical oncology, Affiliated Taikang Xianlin Drum Tower Hospital, Medical School of Nanjing University, Nanjing, China
| | - Yan Wang
- Department of Medical Oncology, Nantong Tumor Hospital, Nantong, China
| | - Xiang-Rong Shi
- Department of Medical Oncology, Nantong Tumor Hospital, Nantong, China
| | - Min-Xin Shi
- Department of Thoracic Surgery, Nantong Tumor Hospital, Nantong, China
| | - Xiao-Dong Zhang
- Department of Medical Oncology, Nantong Tumor Hospital, Nantong, China
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Rapamycin Re-Directs Lysosome Network, Stimulates ER-Remodeling, Involving Membrane CD317 and Affecting Exocytosis, in Campylobacter Jejuni-Lysate-Infected U937 Cells. Int J Mol Sci 2020; 21:ijms21062207. [PMID: 32210050 PMCID: PMC7139683 DOI: 10.3390/ijms21062207] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 03/09/2020] [Accepted: 03/18/2020] [Indexed: 02/07/2023] Open
Abstract
The Gram-negative Campylobacter jejuni is a major cause of foodborne gastroenteritis in humans worldwide. The cytotoxic effects of Campylobacter have been mainly ascribed to the actions of the cytolethal distending toxin (CDT): it is mandatory to put in evidence risk factors for sequela development, such as reactive arthritis (ReA) and Guillain–Barré syndrome (GBS). Several researches are directed to managing symptom severity and the possible onset of sequelae. We found for the first time that rapamycin (RM) is able to largely inhibit the action of C. jejuni lysate CDT in U937 cells, and to partially avoid the activation of specific sub-lethal effects. In fact, we observed that the ability of this drug to redirect lysosomal compartment, stimulate ER-remodeling (highlighted by ER–lysosome and ER–mitochondria contacts), protect mitochondria network, and downregulate CD317/tetherin, is an important component of membrane microdomains. In particular, lysosomes are involved in the process of the reduction of intoxication, until the final step of lysosome exocytosis. Our results indicate that rapamycin confers protection against C. jejuni bacterial lysate insults to myeloid cells.
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